After completing trials around the UK, the ship has now returned to its homeport in Portsmouth.
A contract for the PIP-related work was awarded by the UK Ministry of Defence (MoD) in 2018.
The associated work involved replacing the two original diesel engines with three new more powerful and cleaner generators.
In addition, one of the ship’s storerooms has been transformed into a high-voltage switchboard to manage the extra power generated.
HMS Dauntless commanding officer commander Ben Power said: “PIP has provided extra flexibility and power that ‘future proofs’ the class for next 20 to 30 years.”
Following its return, HMS Dauntless will undergo maintenance and receive other system upgrades until the end of this year.
Once maintenance is complete, the Daring-class destroyer will undergo trials, training and evaluation early next year to prepare for its worldwide deployment later in the year.
At present, Type 45’s lead ship, HMS Daring, is undergoing PIP in Birkenhead, while HMS Dragon is receiving new engines under a broader refit work at BAE Systems ’ facility in Portsmouth.
The event allowed participants to showcase their respective autonomous mine countermeasures systems in Scotland’s west coast area of naval exercise.